{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["engineering feature", "application", "machanical property", "process characterization", "manufacturing process", "enabling technology"], "input": "Printing of free standing walls and pilars is also a limiting factor as both the achievable minimal cross sectional area and maximal aspect ratio are limited ."}
{"engineering feature": ["aspect ratio"], "application": [], "machanical property": [], "process characterization": [], "manufacturing process": [], "enabling technology": []}